3 * @copyright Copyright (C) 2020, Friendica
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Protocol\ActivityPub;
24 use Friendica\Content\PageInfo;
25 use Friendica\Content\Text\BBCode;
26 use Friendica\Content\Text\HTML;
27 use Friendica\Core\Logger;
28 use Friendica\Core\Protocol;
29 use Friendica\Database\DBA;
31 use Friendica\Model\APContact;
32 use Friendica\Model\Contact;
33 use Friendica\Model\Conversation;
34 use Friendica\Model\Event;
35 use Friendica\Model\Item;
36 use Friendica\Model\ItemURI;
37 use Friendica\Model\Mail;
38 use Friendica\Model\Tag;
39 use Friendica\Model\User;
40 use Friendica\Model\Post;
41 use Friendica\Protocol\Activity;
42 use Friendica\Protocol\ActivityPub;
43 use Friendica\Protocol\Relay;
44 use Friendica\Util\DateTimeFormat;
45 use Friendica\Util\JsonLD;
46 use Friendica\Util\Strings;
49 * ActivityPub Processor Protocol class
54 * Converts mentions from Pleroma into the Friendica format
58 * @return string converted body
60 private static function convertMentions($body)
62 $URLSearchString = "^\[\]";
63 $body = preg_replace("/\[url\=([$URLSearchString]*)\]([#@!])(.*?)\[\/url\]/ism", '$2[url=$1]$3[/url]', $body);
69 * Replaces emojis in the body
71 * @param array $emojis
74 * @return string with replaced emojis
76 private static function replaceEmojis($body, array $emojis)
78 foreach ($emojis as $emoji) {
79 $replace = '[class=emoji mastodon][img=' . $emoji['href'] . ']' . $emoji['name'] . '[/img][/class]';
80 $body = str_replace($emoji['name'], $replace, $body);
86 * Store attached media files in the post-media table
89 * @param array $attachment
92 private static function storeAttachmentAsMedia(int $uriid, array $attachment)
94 if (empty($attachment['url'])) {
98 $data = ['uri-id' => $uriid];
100 $filetype = strtolower(substr($attachment['mediaType'], 0, strpos($attachment['mediaType'], '/')));
101 if ($filetype == 'image') {
102 $data['type'] = Post\Media::IMAGE;
103 } elseif ($filetype == 'video') {
104 $data['type'] = Post\Media::VIDEO;
105 } elseif ($filetype == 'audio') {
106 $data['type'] = Post\Media::AUDIO;
107 } elseif (in_array($attachment['mediaType'], ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
108 $data['type'] = Post\Media::TORRENT;
110 Logger::info('Unknown type', ['attachment' => $attachment]);
114 $data['url'] = $attachment['url'];
115 $data['mimetype'] = $attachment['mediaType'];
116 $data['height'] = $attachment['height'] ?? null;
117 $data['size'] = $attachment['size'] ?? null;
118 $data['preview'] = $attachment['image'] ?? null;
119 $data['description'] = $attachment['name'] ?? null;
121 Post\Media::insert($data);
125 * Add attachment data to the item array
127 * @param array $activity
130 * @return array array
132 private static function constructAttachList($activity, $item)
134 if (empty($activity['attachments'])) {
138 $item['attach'] = '';
140 foreach ($activity['attachments'] as $attach) {
141 switch ($attach['type']) {
144 'url' => $attach['url'],
145 'type' => $attach['type'],
146 'title' => $attach['title'] ?? '',
147 'text' => $attach['desc'] ?? '',
148 'image' => $attach['image'] ?? '',
152 $item['body'] = PageInfo::appendDataToBody($item['body'], $data);
155 self::storeAttachmentAsMedia($item['uri-id'], $attach);
157 $filetype = strtolower(substr($attach['mediaType'], 0, strpos($attach['mediaType'], '/')));
158 if ($filetype == 'image') {
159 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
163 $item['body'] .= "\n";
165 // image is the preview/thumbnail URL
166 if (!empty($attach['image'])) {
167 $item['body'] .= '[url=' . $attach['url'] . ']';
168 $attach['url'] = $attach['image'];
171 if (empty($attach['name'])) {
172 $item['body'] .= '[img]' . $attach['url'] . '[/img]';
174 $item['body'] .= '[img=' . $attach['url'] . ']' . $attach['name'] . '[/img]';
177 if (!empty($attach['image'])) {
178 $item['body'] .= '[/url]';
180 } elseif ($filetype == 'audio') {
181 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
185 $item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
186 } elseif ($filetype == 'video') {
187 if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
191 $item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
193 if (!empty($item['attach'])) {
194 $item['attach'] .= ',';
196 $item['attach'] = '';
199 $item['attach'] .= '[attach]href="' . $attach['url'] . '" length="' . ($attach['length'] ?? '0') . '" type="' . $attach['mediaType'] . '" title="' . ($attach['name'] ?? '') . '"[/attach]';
210 * @param array $activity Activity array
211 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
213 public static function updateItem($activity)
215 $item = Item::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity'], ['uri' => $activity['id']]);
216 if (!DBA::isResult($item)) {
217 Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
218 $item = self::createItem($activity);
219 self::postItem($activity, $item);
223 $item['changed'] = DateTimeFormat::utcNow();
224 $item['edited'] = DateTimeFormat::utc($activity['updated']);
226 $item = self::processContent($activity, $item);
228 $item = self::constructAttachList($activity, $item);
234 Item::update($item, ['uri' => $activity['id']]);
238 * Prepares data for a message
240 * @param array $activity Activity array
241 * @return array Internal item
242 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
243 * @throws \ImagickException
245 public static function createItem($activity)
248 $item['verb'] = Activity::POST;
249 $item['thr-parent'] = $activity['reply-to-id'];
251 if ($activity['reply-to-id'] == $activity['id']) {
252 $item['gravity'] = GRAVITY_PARENT;
253 $item['object-type'] = Activity\ObjectType::NOTE;
255 $item['gravity'] = GRAVITY_COMMENT;
256 $item['object-type'] = Activity\ObjectType::COMMENT;
259 if (empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Item::exists(['uri' => $activity['reply-to-id']])) {
260 Logger::notice('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id']]);
261 self::fetchMissingActivity($activity['reply-to-id'], $activity);
264 $item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
266 /// @todo What to do with $activity['context']?
267 if (empty($activity['directmessage']) && ($item['gravity'] != GRAVITY_PARENT) && !Item::exists(['uri' => $item['thr-parent']])) {
268 Logger::info('Parent not found, message will be discarded.', ['thr-parent' => $item['thr-parent']]);
272 $item['network'] = Protocol::ACTIVITYPUB;
273 $item['author-link'] = $activity['author'];
274 $item['author-id'] = Contact::getIdForURL($activity['author']);
275 $item['owner-link'] = $activity['actor'];
276 $item['owner-id'] = Contact::getIdForURL($activity['actor']);
278 if (in_array(0, $activity['receiver']) && !empty($activity['unlisted'])) {
279 $item['private'] = Item::UNLISTED;
280 } elseif (in_array(0, $activity['receiver'])) {
281 $item['private'] = Item::PUBLIC;
283 $item['private'] = Item::PRIVATE;
286 if (!empty($activity['raw'])) {
287 $item['source'] = $activity['raw'];
288 $item['protocol'] = Conversation::PARCEL_ACTIVITYPUB;
289 $item['conversation-href'] = $activity['context'] ?? '';
290 $item['conversation-uri'] = $activity['conversation'] ?? '';
292 if (isset($activity['push'])) {
293 $item['direction'] = $activity['push'] ? Conversation::PUSH : Conversation::PULL;
297 $item['isForum'] = false;
299 if (!empty($activity['thread-completion'])) {
300 if ($activity['thread-completion'] != $item['owner-id']) {
301 $actor = Contact::getById($activity['thread-completion'], ['url']);
302 $item['causer-link'] = $actor['url'];
303 $item['causer-id'] = $activity['thread-completion'];
304 Logger::info('Use inherited actor as causer.', ['id' => $item['owner-id'], 'activity' => $activity['thread-completion'], 'owner' => $item['owner-link'], 'actor' => $actor['url']]);
306 // Store the original actor in the "causer" fields to enable the check for ignored or blocked contacts
307 $item['causer-link'] = $item['owner-link'];
308 $item['causer-id'] = $item['owner-id'];
309 Logger::info('Use actor as causer.', ['id' => $item['owner-id'], 'actor' => $item['owner-link']]);
312 $item['owner-link'] = $item['author-link'];
313 $item['owner-id'] = $item['author-id'];
315 $actor = APContact::getByURL($item['owner-link'], false);
316 $item['isForum'] = ($actor['type'] == 'Group');
319 $item['uri'] = $activity['id'];
321 $item['created'] = DateTimeFormat::utc($activity['published']);
322 $item['edited'] = DateTimeFormat::utc($activity['updated']);
323 $guid = $activity['sc:identifier'] ?: self::getGUIDByURL($item['uri']);
324 $item['guid'] = $activity['diaspora:guid'] ?: $guid;
326 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
328 $item = self::processContent($activity, $item);
330 Logger::info('Message was not processed');
334 $item['plink'] = $activity['alternate-url'] ?? $item['uri'];
336 $item = self::constructAttachList($activity, $item);
344 * @param array $activity
345 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
346 * @throws \ImagickException
348 public static function deleteItem($activity)
350 $owner = Contact::getIdForURL($activity['actor']);
352 Logger::info('Deleting item', ['object' => $activity['object_id'], 'owner' => $owner]);
353 Item::markForDeletion(['uri' => $activity['object_id'], 'owner-id' => $owner]);
357 * Prepare the item array for an activity
359 * @param array $activity Activity array
360 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
361 * @throws \ImagickException
363 public static function addTag($activity)
365 if (empty($activity['object_content']) || empty($activity['object_id'])) {
369 foreach ($activity['receiver'] as $receiver) {
370 $item = Item::selectFirst(['id', 'uri-id', 'tag', 'origin', 'author-link'], ['uri' => $activity['target_id'], 'uid' => $receiver]);
371 if (!DBA::isResult($item)) {
372 // We don't fetch missing content for this purpose
376 if (($item['author-link'] != $activity['actor']) && !$item['origin']) {
377 Logger::info('Not origin, not from the author, skipping update', ['id' => $item['id'], 'author' => $item['author-link'], 'actor' => $activity['actor']]);
381 Tag::store($item['uri-id'], Tag::HASHTAG, $activity['object_content'], $activity['object_id']);
382 Logger::info('Tagged item', ['id' => $item['id'], 'tag' => $activity['object_content'], 'uri' => $activity['target_id'], 'actor' => $activity['actor']]);
387 * Prepare the item array for an activity
389 * @param array $activity Activity array
390 * @param string $verb Activity verb
391 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
392 * @throws \ImagickException
394 public static function createActivity($activity, $verb)
396 $item = self::createItem($activity);
397 $item['verb'] = $verb;
398 $item['thr-parent'] = $activity['object_id'];
399 $item['gravity'] = GRAVITY_ACTIVITY;
400 $item['object-type'] = Activity\ObjectType::NOTE;
402 $item['diaspora_signed_text'] = $activity['diaspora:like'] ?? '';
404 self::postItem($activity, $item);
410 * @param array $activity Activity array
414 public static function createEvent($activity, $item)
416 $event['summary'] = HTML::toBBCode($activity['name']);
417 $event['desc'] = HTML::toBBCode($activity['content']);
418 $event['start'] = $activity['start-time'];
419 $event['finish'] = $activity['end-time'];
420 $event['nofinish'] = empty($event['finish']);
421 $event['location'] = $activity['location'];
422 $event['adjust'] = true;
423 $event['cid'] = $item['contact-id'];
424 $event['uid'] = $item['uid'];
425 $event['uri'] = $item['uri'];
426 $event['edited'] = $item['edited'];
427 $event['private'] = $item['private'];
428 $event['guid'] = $item['guid'];
429 $event['plink'] = $item['plink'];
431 $condition = ['uri' => $item['uri'], 'uid' => $item['uid']];
432 $ev = DBA::selectFirst('event', ['id'], $condition);
433 if (DBA::isResult($ev)) {
434 $event['id'] = $ev['id'];
437 $event_id = Event::store($event);
438 Logger::info('Event was stored', ['id' => $event_id]);
442 * Process the content
444 * @param array $activity Activity array
446 * @return array|bool Returns the item array or false if there was an unexpected occurrence
449 private static function processContent($activity, $item)
451 $item['title'] = HTML::toBBCode($activity['name']);
453 $content = HTML::toBBCode($activity['content']);
455 if (!empty($activity['emojis'])) {
456 $content = self::replaceEmojis($content, $activity['emojis']);
459 $content = self::convertMentions($content);
461 if (!empty($activity['source'])) {
462 $item['body'] = $activity['source'];
463 $item['raw-body'] = $content;
465 if (empty($activity['directmessage']) && ($item['thr-parent'] != $item['uri']) && ($item['gravity'] == GRAVITY_COMMENT)) {
466 $item_private = !in_array(0, $activity['item_receiver']);
467 $parent = Item::selectFirst(['id', 'uri-id', 'private', 'author-link', 'alias'], ['uri' => $item['thr-parent']]);
468 if (!DBA::isResult($parent)) {
469 Logger::warning('Unknown parent item.', ['uri' => $item['thr-parent']]);
472 if ($item_private && ($parent['private'] != Item::PRIVATE)) {
473 Logger::warning('Item is private but the parent is not. Dropping.', ['item-uri' => $item['uri'], 'thr-parent' => $item['thr-parent']]);
477 $content = self::removeImplicitMentionsFromBody($content, $parent);
479 $item['content-warning'] = HTML::toBBCode($activity['summary']);
480 $item['raw-body'] = $item['body'] = $content;
483 self::storeFromBody($item);
484 self::storeTags($item['uri-id'], $activity['tags']);
486 $item['location'] = $activity['location'];
488 if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
489 $item['coord'] = $activity['latitude'] . ' ' . $activity['longitude'];
492 $item['app'] = $activity['generator'];
498 * Store hashtags and mentions
502 private static function storeFromBody(array $item)
504 // Make sure to delete all existing tags (can happen when called via the update functionality)
505 DBA::delete('post-tag', ['uri-id' => $item['uri-id']]);
507 Tag::storeFromBody($item['uri-id'], $item['body'], '@!');
511 * Generate a GUID out of an URL
513 * @param string $url message URL
514 * @return string with GUID
516 private static function getGUIDByURL(string $url)
518 $parsed = parse_url($url);
520 $host_hash = hash('crc32', $parsed['host']);
522 unset($parsed["scheme"]);
523 unset($parsed["host"]);
525 $path = implode("/", $parsed);
527 return $host_hash . '-'. hash('fnv164', $path) . '-'. hash('joaat', $path);
531 * Creates an item post
533 * @param array $activity Activity data
534 * @param array $item item array
535 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
536 * @throws \ImagickException
538 public static function postItem(array $activity, array $item)
545 ksort($activity['receiver']);
547 foreach ($activity['receiver'] as $receiver) {
548 if ($receiver == -1) {
552 $item['uid'] = $receiver;
554 $type = $activity['reception_type'][$receiver] ?? Receiver::TARGET_UNKNOWN;
556 case Receiver::TARGET_TO:
557 $item['post-type'] = Item::PT_TO;
559 case Receiver::TARGET_CC:
560 $item['post-type'] = Item::PT_CC;
562 case Receiver::TARGET_BTO:
563 $item['post-type'] = Item::PT_BTO;
565 case Receiver::TARGET_BCC:
566 $item['post-type'] = Item::PT_BCC;
568 case Receiver::TARGET_FOLLOWER:
569 $item['post-type'] = Item::PT_FOLLOWER;
571 case Receiver::TARGET_ANSWER:
572 $item['post-type'] = Item::PT_COMMENT;
574 case Receiver::TARGET_GLOBAL:
575 $item['post-type'] = Item::PT_GLOBAL;
578 $item['post-type'] = Item::PT_ARTICLE;
581 if (!empty($activity['from-relay'])) {
582 $item['post-type'] = Item::PT_RELAY;
583 } elseif (!empty($activity['thread-completion'])) {
584 $item['post-type'] = Item::PT_FETCHED;
587 if ($item['isForum'] ?? false) {
588 $item['contact-id'] = Contact::getIdForURL($activity['actor'], $receiver);
590 $item['contact-id'] = Contact::getIdForURL($activity['author'], $receiver);
593 if (($receiver != 0) && empty($item['contact-id'])) {
594 $item['contact-id'] = Contact::getIdForURL($activity['author']);
597 if (!empty($activity['directmessage'])) {
598 self::postMail($activity, $item);
602 if (DI::pConfig()->get($receiver, 'system', 'accept_only_sharer', false) && ($receiver != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
603 $skip = !Contact::isSharingByURL($activity['author'], $receiver);
605 if ($skip && (($activity['type'] == 'as:Announce') || ($item['isForum'] ?? false))) {
606 $skip = !Contact::isSharingByURL($activity['actor'], $receiver);
610 Logger::info('Skipping post', ['uid' => $receiver, 'url' => $item['uri']]);
614 Logger::info('Accepting post', ['uid' => $receiver, 'url' => $item['uri']]);
617 if (($item['gravity'] != GRAVITY_ACTIVITY) && ($activity['object_type'] == 'as:Event')) {
618 self::createEvent($activity, $item);
621 $item_id = Item::insert($item);
623 Logger::info('Item insertion successful', ['user' => $item['uid'], 'item_id' => $item_id]);
625 Logger::notice('Item insertion aborted', ['user' => $item['uid']]);
628 if ($item['uid'] == 0) {
633 // Store send a follow request for every reshare - but only when the item had been stored
634 if ($stored && ($item['private'] != Item::PRIVATE) && ($item['gravity'] == GRAVITY_PARENT) && ($item['author-link'] != $item['owner-link'])) {
635 $author = APContact::getByURL($item['owner-link'], false);
636 // We send automatic follow requests for reshared messages. (We don't need though for forum posts)
637 if ($author['type'] != 'Group') {
638 Logger::info('Send follow request', ['uri' => $item['uri'], 'stored' => $stored, 'to' => $item['author-link']]);
639 ActivityPub\Transmitter::sendFollowObject($item['uri'], $item['author-link']);
645 * Store tags and mentions into the tag table
647 * @param integer $uriid
650 private static function storeTags(int $uriid, array $tags = null)
652 foreach ($tags as $tag) {
653 if (empty($tag['name']) || empty($tag['type']) || !in_array($tag['type'], ['Mention', 'Hashtag'])) {
657 $hash = substr($tag['name'], 0, 1);
659 if ($tag['type'] == 'Mention') {
660 if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
661 Tag::TAG_CHARACTER[Tag::EXCLUSIVE_MENTION],
662 Tag::TAG_CHARACTER[Tag::IMPLICIT_MENTION]])) {
663 $tag['name'] = substr($tag['name'], 1);
665 $type = Tag::IMPLICIT_MENTION;
667 if (!empty($tag['href'])) {
668 $apcontact = APContact::getByURL($tag['href']);
669 if (!empty($apcontact['name']) || !empty($apcontact['nick'])) {
670 $tag['name'] = $apcontact['name'] ?: $apcontact['nick'];
673 } elseif ($tag['type'] == 'Hashtag') {
674 if ($hash == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
675 $tag['name'] = substr($tag['name'], 1);
677 $type = Tag::HASHTAG;
680 if (empty($tag['name'])) {
684 Tag::store($uriid, $type, $tag['name'], $tag['href']);
689 * Creates an mail post
691 * @param array $activity Activity data
692 * @param array $item item array
693 * @return int|bool New mail table row id or false on error
694 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
696 private static function postMail($activity, $item)
698 if (($item['gravity'] != GRAVITY_PARENT) && !DBA::exists('mail', ['uri' => $item['thr-parent'], 'uid' => $item['uid']])) {
699 Logger::info('Parent not found, mail will be discarded.', ['uid' => $item['uid'], 'uri' => $item['thr-parent']]);
703 Logger::info('Direct Message', $item);
706 $msg['uid'] = $item['uid'];
708 $msg['contact-id'] = $item['contact-id'];
710 $contact = Contact::getById($item['contact-id'], ['name', 'url', 'photo']);
711 $msg['from-name'] = $contact['name'];
712 $msg['from-url'] = $contact['url'];
713 $msg['from-photo'] = $contact['photo'];
715 $msg['uri'] = $item['uri'];
716 $msg['created'] = $item['created'];
718 $parent = DBA::selectFirst('mail', ['parent-uri', 'title'], ['uri' => $item['thr-parent']]);
719 if (DBA::isResult($parent)) {
720 $msg['parent-uri'] = $parent['parent-uri'];
721 $msg['title'] = $parent['title'];
723 $msg['parent-uri'] = $item['thr-parent'];
725 if (!empty($item['title'])) {
726 $msg['title'] = $item['title'];
727 } elseif (!empty($item['content-warning'])) {
728 $msg['title'] = $item['content-warning'];
730 // Trying to generate a title out of the body
731 $title = $item['body'];
733 while (preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $title, $matches)) {
734 $title = $matches[3];
737 $title = trim(HTML::toPlaintext(BBCode::convert($title, false, BBCode::API, true), 0));
739 if (strlen($title) > 20) {
740 $title = substr($title, 0, 20) . '...';
743 $msg['title'] = $title;
746 $msg['body'] = $item['body'];
748 return Mail::insert($msg);
752 * Fetches missing posts
754 * @param string $url message URL
755 * @param array $child activity array with the child of this message
756 * @param string $relay_actor Relay actor
757 * @return string fetched message URL
758 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
760 public static function fetchMissingActivity(string $url, array $child = [], string $relay_actor = '')
762 if (!empty($child['receiver'])) {
763 $uid = ActivityPub\Receiver::getFirstUserFromReceivers($child['receiver']);
768 $object = ActivityPub::fetchContent($url, $uid);
769 if (empty($object)) {
770 Logger::log('Activity ' . $url . ' was not fetchable, aborting.');
774 if (empty($object['id'])) {
775 Logger::log('Activity ' . $url . ' has got not id, aborting. ' . json_encode($object));
779 if (!empty($object['actor'])) {
780 $object_actor = $object['actor'];
781 } elseif (!empty($object['attributedTo'])) {
782 $object_actor = $object['attributedTo'];
788 $signer = [$object_actor];
790 if (!empty($child['author'])) {
791 $actor = $child['author'];
794 $actor = $object_actor;
797 if (!empty($object['published'])) {
798 $published = $object['published'];
799 } elseif (!empty($child['published'])) {
800 $published = $child['published'];
802 $published = DateTimeFormat::utcNow();
806 $activity['@context'] = $object['@context'];
807 unset($object['@context']);
808 $activity['id'] = $object['id'];
809 $activity['to'] = $object['to'] ?? [];
810 $activity['cc'] = $object['cc'] ?? [];
811 $activity['actor'] = $actor;
812 $activity['object'] = $object;
813 $activity['published'] = $published;
814 $activity['type'] = 'Create';
816 $ldactivity = JsonLD::compact($activity);
818 if (!empty($relay_actor)) {
819 $ldactivity['thread-completion'] = $ldactivity['from-relay'] = Contact::getIdForURL($relay_actor);
820 } elseif (!empty($child['thread-completion'])) {
821 $ldactivity['thread-completion'] = $child['thread-completion'];
823 $ldactivity['thread-completion'] = Contact::getIdForURL($actor);
826 if (!empty($relay_actor) && !self::acceptIncomingMessage($ldactivity, $object['id'])) {
830 ActivityPub\Receiver::processActivity($ldactivity, json_encode($activity), $uid, true, false, $signer);
832 Logger::notice('Activity had been fetched and processed.', ['url' => $url, 'object' => $activity['id']]);
834 return $activity['id'];
838 * Test if incoming relay messages should be accepted
840 * @param array $activity activity array
841 * @param string $id object ID
842 * @return boolean true if message is accepted
844 private static function acceptIncomingMessage(array $activity, string $id)
846 if (empty($activity['as:object'])) {
847 Logger::info('No object field in activity - accepted', ['id' => $id]);
851 $replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
852 if (Item::exists(['uri' => $replyto])) {
853 Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'replyto' => $replyto]);
857 $attributed_to = JsonLD::fetchElement($activity['as:object'], 'as:attributedTo', '@id');
858 $authorid = Contact::getIdForURL($attributed_to);
860 $body = HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value'));
863 $tags = Receiver::processTags(JsonLD::fetchElementArray($activity['as:object'], 'as:tag') ?? []);
865 foreach ($tags as $tag) {
866 if ($tag['type'] != 'Hashtag') {
869 $messageTags[] = ltrim(mb_strtolower($tag['name']), '#');
873 return Relay::isSolicitedPost($messageTags, $body, $authorid, $id, Protocol::ACTIVITYPUB);
877 * perform a "follow" request
879 * @param array $activity
880 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
881 * @throws \ImagickException
883 public static function followUser($activity)
885 $uid = User::getIdForURL($activity['object_id']);
890 $owner = User::getOwnerDataById($uid);
895 $cid = Contact::getIdForURL($activity['actor'], $uid);
897 self::switchContact($cid);
898 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
899 $contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
904 $item = ['author-id' => Contact::getIdForURL($activity['actor']),
905 'author-link' => $activity['actor']];
907 $note = Strings::escapeTags(trim($activity['content'] ?? ''));
909 // Ensure that the contact has got the right network type
910 self::switchContact($item['author-id']);
912 $result = Contact::addRelationship($owner, $contact, $item, false, $note);
913 if ($result === true) {
914 ActivityPub\Transmitter::sendContactAccept($item['author-link'], $activity['id'], $owner['uid']);
917 $cid = Contact::getIdForURL($activity['actor'], $uid);
922 if (empty($contact)) {
923 DBA::update('contact', ['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
926 Logger::log('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
930 * Update the given profile
932 * @param array $activity
935 public static function updatePerson($activity)
937 if (empty($activity['object_id'])) {
941 Logger::info('Updating profile', ['object' => $activity['object_id']]);
942 Contact::updateFromProbeByURL($activity['object_id']);
946 * Delete the given profile
948 * @param array $activity
949 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
951 public static function deletePerson($activity)
953 if (empty($activity['object_id']) || empty($activity['actor'])) {
954 Logger::info('Empty object id or actor.');
958 if ($activity['object_id'] != $activity['actor']) {
959 Logger::info('Object id does not match actor.');
963 $contacts = DBA::select('contact', ['id'], ['nurl' => Strings::normaliseLink($activity['object_id'])]);
964 while ($contact = DBA::fetch($contacts)) {
965 Contact::remove($contact['id']);
967 DBA::close($contacts);
969 Logger::info('Deleted contact', ['object' => $activity['object_id']]);
973 * Accept a follow request
975 * @param array $activity
976 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
977 * @throws \ImagickException
979 public static function acceptFollowUser($activity)
981 $uid = User::getIdForURL($activity['object_actor']);
986 $cid = Contact::getIdForURL($activity['actor'], $uid);
988 Logger::info('No contact found', ['actor' => $activity['actor']]);
992 self::switchContact($cid);
994 $fields = ['pending' => false];
996 $contact = DBA::selectFirst('contact', ['rel'], ['id' => $cid]);
997 if ($contact['rel'] == Contact::FOLLOWER) {
998 $fields['rel'] = Contact::FRIEND;
1001 $condition = ['id' => $cid];
1002 DBA::update('contact', $fields, $condition);
1003 Logger::info('Accept contact request', ['contact' => $cid, 'user' => $uid]);
1007 * Reject a follow request
1009 * @param array $activity
1010 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1011 * @throws \ImagickException
1013 public static function rejectFollowUser($activity)
1015 $uid = User::getIdForURL($activity['object_actor']);
1020 $cid = Contact::getIdForURL($activity['actor'], $uid);
1022 Logger::info('No contact found', ['actor' => $activity['actor']]);
1026 self::switchContact($cid);
1028 if (DBA::exists('contact', ['id' => $cid, 'rel' => Contact::SHARING])) {
1029 Contact::remove($cid);
1030 Logger::info('Rejected contact request - contact removed', ['contact' => $cid, 'user' => $uid]);
1032 Logger::info('Rejected contact request', ['contact' => $cid, 'user' => $uid]);
1037 * Undo activity like "like" or "dislike"
1039 * @param array $activity
1040 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1041 * @throws \ImagickException
1043 public static function undoActivity($activity)
1045 if (empty($activity['object_id'])) {
1049 if (empty($activity['object_actor'])) {
1053 $author_id = Contact::getIdForURL($activity['object_actor']);
1054 if (empty($author_id)) {
1058 Item::markForDeletion(['uri' => $activity['object_id'], 'author-id' => $author_id, 'gravity' => GRAVITY_ACTIVITY]);
1062 * Activity to remove a follower
1064 * @param array $activity
1065 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1066 * @throws \ImagickException
1068 public static function undoFollowUser($activity)
1070 $uid = User::getIdForURL($activity['object_object']);
1075 $owner = User::getOwnerDataById($uid);
1076 if (empty($owner)) {
1080 $cid = Contact::getIdForURL($activity['actor'], $uid);
1082 Logger::info('No contact found', ['actor' => $activity['actor']]);
1086 self::switchContact($cid);
1088 $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
1089 if (!DBA::isResult($contact)) {
1093 Contact::removeFollower($owner, $contact);
1094 Logger::info('Undo following request', ['contact' => $cid, 'user' => $uid]);
1098 * Switches a contact to AP if needed
1100 * @param integer $cid Contact ID
1101 * @throws \Exception
1103 private static function switchContact($cid)
1105 $contact = DBA::selectFirst('contact', ['network', 'url'], ['id' => $cid]);
1106 if (!DBA::isResult($contact) || in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN]) || Contact::isLocal($contact['url'])) {
1110 Logger::info('Change existing contact', ['cid' => $cid, 'previous' => $contact['network']]);
1111 Contact::updateFromProbe($cid);
1115 * Collects implicit mentions like:
1116 * - the author of the parent item
1117 * - all the mentioned conversants in the parent item
1119 * @param array $parent Item array with at least ['id', 'author-link', 'alias']
1121 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1123 private static function getImplicitMentionList(array $parent)
1125 $parent_terms = Tag::getByURIId($parent['uri-id'], [Tag::MENTION, Tag::IMPLICIT_MENTION, Tag::EXCLUSIVE_MENTION]);
1127 $parent_author = Contact::getByURL($parent['author-link'], false, ['url', 'nurl', 'alias']);
1129 $implicit_mentions = [];
1130 if (empty($parent_author['url'])) {
1131 Logger::notice('Author public contact unknown.', ['author-link' => $parent['author-link'], 'item-id' => $parent['id']]);
1133 $implicit_mentions[] = $parent_author['url'];
1134 $implicit_mentions[] = $parent_author['nurl'];
1135 $implicit_mentions[] = $parent_author['alias'];
1138 if (!empty($parent['alias'])) {
1139 $implicit_mentions[] = $parent['alias'];
1142 foreach ($parent_terms as $term) {
1143 $contact = Contact::getByURL($term['url'], false, ['url', 'nurl', 'alias']);
1144 if (!empty($contact['url'])) {
1145 $implicit_mentions[] = $contact['url'];
1146 $implicit_mentions[] = $contact['nurl'];
1147 $implicit_mentions[] = $contact['alias'];
1151 return $implicit_mentions;
1155 * Strips from the body prepended implicit mentions
1157 * @param string $body
1158 * @param array $parent
1161 private static function removeImplicitMentionsFromBody(string $body, array $parent)
1163 if (DI::config()->get('system', 'disable_implicit_mentions')) {
1167 $potential_mentions = self::getImplicitMentionList($parent);
1169 $kept_mentions = [];
1171 // Extract one prepended mention at a time from the body
1172 while(preg_match('#^(@\[url=([^\]]+)].*?\[\/url]\s)(.*)#is', $body, $matches)) {
1173 if (!in_array($matches[2], $potential_mentions)) {
1174 $kept_mentions[] = $matches[1];
1177 $body = $matches[3];
1180 // Re-appending the kept mentions to the body after extraction
1181 $kept_mentions[] = $body;
1183 return implode('', $kept_mentions);